/*
 * Copyright (c) 2017-2021 Nitrite author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.dizitart.no2.collection;

import org.junit.Test;

import java.util.HashSet;
import java.util.Set;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class SnowflakeIdGeneratorTest {

    @Test
    public void testTillNextMillis() {
        assertTrue((new SnowflakeIdGenerator()).tillNextMillis(1L) > 1);
    }

    @Test
    public void testGetId() {
        assertTrue((new SnowflakeIdGenerator()).getId() != 0);
    }

    @Test
    public void testUniqueness() {
        SnowflakeIdGenerator generator = new SnowflakeIdGenerator();
        Set<Long> ids = new HashSet<>();
        for (int j = 0; j < 100; j++) {
            ids.add(generator.getId());
        }

        assertEquals(100, ids.size());
    }
}

